Locomotive fire box



Dec. 14,1926. v 1,610,231

P. W. BARKER LOCOMOTIVE FIRE BOX Filed Feb. 1, 1926 2 Shee'Es-Sheet 1 IN V EN TOR. Haw /f diff/m7? ATTORNEY.

Dec- 14 1926.

P. w. BARKER LOCOMOTIVE FIRE BOX 2 Sheet-Sheet 2 Filed Feb. 1. 1926ATTORNEY.

": PERRY w. BARKER,

Patented Dec. 1 926.

FLD NY commas, JA lGHIOB- or one-irate e01 are;

BALroUn, or DENVER, oo onAnQ; v.

monomer has ox.

' Application filed February This invention relates to an improved formof firerbrickarch' construction for use in the fire boxes oflocomotive-boilers, and to a novel Construction of firebrick for use inthe arch.

t is a well known fact that a square footof ordinary fire box heating'surfa'cewill;

generate five and one half times asmuchi steam as a square foot of flueheating surface, therefore, a device or construction:

whichwill increase the fire box'heating area .or which Willincreasetheamount of heat ap plied to a square foot of fire box-heating area willresultin an lncreased production of steam bythe boiler. 4 V

V The principal object of this invention is to increase the amount ofheat applied to the fire box heating surface. Another object istoprovide a- (lQVICQ Of tion' of the gases and. act as asmoke' con sumen cOther objects and advantages residein the detail construction of the'inventionywhich:

is designed for simplicity, economy, and 'efii- 7 therefore,absorbedfrom these gases bythe ciency. These .will become more apparent from thefollowing description.

In the following detailed description of the invention, reference is hadto the accompanying drawings which form a, part hereof; Like'numeralsrefer to like parts'in all views of the drawingsiandthroughout thedescrip tion. a M,

' 1n the drawings?! Fig. 1 is a vertical, longitudinal section; throughthe fire box portion of a locomot vef boiler. Fig. 2 is a cross sectionEl 2, Fig. 1. V

Fig. 3 is a detail perspective view'of a form of fire brick which may beemployed in the invention. 1 V

Fig. a is a horizontal'sectiozntaken on the taken on the line line 14,Fig. 1, with the fire brick arches removed so as to I illustrate thearch tube:

supporting structure.

Figs; 5 and 6 are alternate forms-of arch tnbe'construction forsupporting t brick arches. I

The present elements of a locomotive boiler are" designated in thedrawing by numeral as follows: fire box 9, boiler 10, fiues 11,

'waterleg 12, crownsheet '18, side sheet 14,

fire door opening15, and back head this character which will assistthe'cOmbus iaae. ser l u 'asjesoj These arch tubes support; an arch formedof lire bricks V17. ThlS arch terminates toward 13, to the flues 11; inthis invention it ispreferredltoihave the arch 17 imperforate.

tubes 18, arenarranged to extend upwardly and. forwardly' above the archtubes '16. i *The arch tubes 18"carry a fire brick arcl1 19, formed of aconstruction which Will allow '"I'n this invention,- a' 's'eries ofupper arch M passages n7 for the gases through the arch.

The. arch '19 terminates adjacent the arch crown-sheet 13 and a great"amount of heat is crown sheetJf' Since the arch 19 is in the -directfp'ath of the gases it'will become heated bricks 17 i at itslowerextremity and adjar By this arrangement, the hot gases are 7 I forcedllltOQtlilOl' intimate contact with the almost-to apoint ofin'candesence, so that it will (also radiate its absorbed heat "tothe;c'rownsheet 13. These features subjectthe:

crown sheetfand the side sheetsofi the fire bOXQ to a higher degreeoftem'perature by {absorbing a greater amount of heatfroin' the s gasebeforethey leave-the fire box for the 7 The upper 1 tubes are preferablyin stalled as indicatedin Figs. 1, 2 and', conv necting at their forwardextremitiesthrough the crown sheet adjacent its forward edge, asindicated at 20, and bending into alignment with and passingv betweenthe arch tubes 16 at their lower extremities, and te-r-fl minating inalignment"with the tubes 16in the side she'etlt above thefire door, asindicated at 21.. Suitable plugs 2:2, 23 and 2e are provided. intheboile-r for cleaning all of the arch tubes. 7 are spaced so that theywill come between the arch tubes 16 as they approach the rear ;of 105the fire box. The arch tubes 16 and the. upper arch tubes 18 arethus'pla'ced in the directpath of'theflames as theypass upward The upperarch tubeslB over the. fire door opening; This greatlyincreases theheating surface of the fire x. l

An. alternateamethod for supporting the upper arch 19 is shown'in Fig.5, in which,

upper arch tubes open through thecrown sheet at 26, and connect at theirlower ex tremities with the arch tubes 16, as shown at 3%. The arch 19is upheld by the upper arch tubes 25, as indicated in broken line. Theconnection at 34 may be welded and re inforced by a surrounding sleeveasshown.

. In Fig. 6 still another alternate method of. supporting the arch 19 isillustrated In this method,-the upper arch tubes 27 enter the fire boxfrom the waterleg 12 in alignment with the lower arch tubes 16. Theycontinue in alignment to a point '28. where they areibent forwardly andupwardly terminating in the crown sheet at. 29.

in broken line. y

In some locomotives, siphons are em- 7 ploye'd having wide V-shapedexits through the crown sheet. In such installations, the arch 19 couldbe carried along the forward 7 leg of the V of'the siphon.

The passages 37 I through the arch 19 7 might be formed by any of themany usual perforated arch constructions. I prefer,

however to employ a fire brick,as illustrafied in Fig. v3. This brick isformed with indentations 32 and 33 open to the top and b'ottomfacesrespectively, of thebrick, so that, when two bricks of this shape areplaced together, an angular passage will be formed between the twoadjacent bricks, as indicated at 37 in Fig. 1. The angle of the passages87 is such as to direct the gases in s a natural flow line to the flues11 without The arch l9 rests upon the tubes 27 as indicated causing eddycurrents or other draft interferences. The

creases-the combustion of the gases and acts to absorb the energytherefrom, and eliminate smoke. When highly heated there will has beendescribed and. illustrated herein, it is desiredv to be understoodthatthe same may be varied, within the scope of therappended claims,without departing from the spirit of the invention.

Having thus described. the invention, what I claim and desire secured byLetters Patent is i r 1. In a locomotive fire box havingan archextending rearwardly and upwardly from theforward plate of said box;asecond arch co-operating with said first arch and extending forwardlyand upwardly therefrom, said first arch being supported on water tubesextending from the forward to rear plates of said fire box, said secondarch being supported on other water tubes extending. from the crownsheet of said fire box to the rear plate thereof and passing betweensaid first tubes.

2. In a locomotive fire box having a series of water tubes extendingfrom adjacent the lower extremity of the forward plate of said fire boxrearwardly to a position over the fire door thereof, and a fire archsupcent the rearward extremity of said' fire box.

the combination of a second series of water tubes extending from saidfirst series forwardly and upwardly therefrom, and a secture. V V.

PERRY BARKER.

H hot passages in the arch 19. through I which the gases must pass,111-.

be an area of surfacecombustion surround- Y ported bysaid tubes andterminating adja-

